Jump to content

Search the Community

Showing results for tags 'radioss'.



More search options

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


Forums

  • Altair Support Forum
    • Welcome to Altair Support Forum
    • Installation and Licensing
    • Modeling & Visualisation
    • Solvers & Optimization
    • Multi Body Simulation
    • Conceptual design and Industrial design
    • Model-Based Development
    • Manufacturing Simulation
    • CAE Process Automation
  • Academic Partner Alliance Forum
    • APA - Composites
    • APA - CFD & Thermal
    • APA - Vehicle Dynamics
    • APA - Manufacturing
    • APA - Crash and Safety
    • APA - Noise, Vibration and Harshness
    • APA - System Level Design
    • APA - Structural and Fatigue
    • APA - Marine
    • APA - Optical Design
  • Japanユーザーフォーラム
    • ユーザーフォーラムへようこそ
    • Altair製品の意外な活用例
    • インストールとライセンス
    • モデリング(プリプロセッシング)
    • シミュレーション技術(ソルバー)
    • データ可視化(ポストプロセッシング)
    • モデルベース開発
    • コンセプト設計と工業デザイン
    • 製造シミュレーション
    • CAE プロセスの自動化
    • 学生向け無償版
    • エンタープライズソリューション

Categories

There are no results to display.


Find results in...

Find results that contain...


Date Created

  • Start

    End


Last Updated

  • Start

    End


Filter by number of...

Joined

  • Start

    End


Group


AIM


MSN


Website URL


ICQ


Yahoo


Jabber


Skype


Interests


Organization


Location

Found 375 results

  1. Hi, In figure, two 1T shells are fixed on one edge. (Gap between 2 shells is 1.1) Interface between top and bottom shells is modeled by using /INTER/TYPE2. To set no relative motion, setting in type2 is default. Concentrated load is excited at node number 7 on top shell. Load curve and scale are as follows. (The load has effect like Impact.) I think that relative displacement between node 7 and 128 is perfectly zero because I use type2 default. However, in x,y,z direction, relative displacement occurs. It looks like almost zero but I want perfectly no relative motion. How can I set that? Another question is Physically the plate is excited by impact, acceleration of plate is decayed I don't use damping, so I think acceleration of some node is decayed to steady state response. But acceleration of node 7 is like this. Response is increased. Why??? Thanks
  2. Hi, Warning is as follows. I connect the master node of the RBODY to beam element. WARNING ID : 448 ** WARNING IN RIGID BODY DEFINITION DESCRIPTION : MASTER NODE 1795 IS CONNECTED TO AN ELEMENT -- RIGID BODY ID : 1633 -- RIGID BODY TITLE : RIGID BODY ID 1634 PRIMARY NODE 1796 NUMBER OF NODES 8 SURFACE LINKED TO BODY 0 SKEW NUMBER 0 SPHERICAL INERTIA FLAG 0 REMOVE SLAVE NODES FROM RIGID WALL(IF=0) 0 CENTER OF MASS FLAG 1 ADDED MASS 0.000 ADDED INERTIA 0.000 0.000 0.000 0.000 0.000 0.000 SECONDARY NODES 1433 1435 1437 1456 1460 1471 1491 1495 Is it wrong? some nodes must be needed between master node of the RBODY and BEAM3N? Thanks
  3. Hi, CST setting ensures that time step is not less than user-defined value but it does not make time step smaller. Is there another way to reduce the time step except making mesh size small? Thanks
  4. Hi, I heard that Penetration is defined as the overlap of the material thickness of shell elements, while Intersection is defined as elements that actually pass completely through one another. My model is as follows. Thickness of the Solid component 'top' is 1T. When I make 'bottom', I use 'translate -> duplicate-> z-direction -1'. (Thickness of each component is 1T.) So I think there is no overlap between 2 solid components. But Penetration check tool detect penetrations. Why does it happen? It means there is overlap between 2 components? Thanks
  5. Hi, I want to know the reason why penetration occurs. auto1 : Length (x-direction) = 1000, Height = 100(y-direction), mesh size = 50 component1(yellow) : same as auto1. When I make component1, I use 'translate -> duplicate-> y-direction -100'. If I assign Property and Material on the components, Penetrations occurs. (If property and material are not assigned, penetrations does not occurs.) Why does it happen?? Thanks.
  6. Hi , I am working on modal analysis of rotor system in optistruct. I have queries regarding constraints. Pls find the following image which shows rotor assembly with bearing. I need to allow rotation free of rotor and shaft at bearing locations. How to give constraints at bearing locations ? Using RBE2 or any other options are there in Optistruct? Thanks Arul
  7. Hello Is it possible to model a 1D element that fails in either tension or shear? I would like analyze a breakaway feature on a structure that absorbs a portion of the impact energy and breaks off. Fracture can be either in tension (i.e cable) or in shear (i.e shear pin). Thank you
  8. Hi,I am trying to simulate a bird impact on a plate with RADIOSS. So I am creating my model on hypermesh now, i chose to consider the bird as a fluid with a density of 438 kg/m3. I would like to work with SI units and the dimensions of the bird are : 0.1325m long cylinder with two hemisphere ends having a radius of 0.075m. I am now trying to mesh this geometry with the SPH module in hypermesh. So i entered a pitch of 1e-3m and a density of 438kg/m3 as i said before. But when i create the mesh, nothing happen and i only get this message "0 mass elements created". I attached my file with the topic. I don't know what could be my error, more of that I tried to do it using mm instead of m and it worked... But I really want to use SI units. Thank you in advance for your help, Gaspard. BirdStrikeSI.hm
  9. Hi, I want to set the damping in the contact. Error message is as follows. I don't know what is wrong. What should do I set something?? Please advise me. Thanks.
  10. Hi, I am trying to simulate a bird impact on a plate with RADIOSS. So I am creating my model on hypermesh now, i chose to consider the bird as a fluid with a density of 438 kg/m3. I would like to work with SI units and the dimensions of the bird are : 0.1325m long cylinder with two hemisphere ends having a radius of 0.075m. I am now trying to mesh this geometry with the SPH module in hypermesh. So i entered a pitch of 1e-3m and a density of 438kg/m3 as i said before. But when i create the mesh, nothing happen and i only get this message "0 mass elements created". I attached my file with the topic. I don't know what could be my error, more of that I tried to do it using mm instead of m and it worked... But I really want to use SI units. Thank you in advance for your help, Gaspard. BirdStrikeSI.hm
  11. Hi, As shown in the figures, When I export 0000.rad file from .hm file (1st figure) and I import 0000.rad file, Rbody checking is removed and component name is changed(2nd figure). (RBODY -> RigidBody8) Why it happens? If I run this 0000.rad file, is it wrong? Thanks.
  12. Hi, I want to use /PRELOAD but I can't find it. I can't find it in load collectors. (I use RADIOSS 2019) Thanks
  13. Hi, I'm beginner of RADIOSS. I want to set the structural damping of steel. But I don't know how. I think there is no setting for structural damping in /DAMP , What should I do? Like OptiStruct(PARAM, G) , is there any card? Thanks
  14. Hello I am using RADIOSS to simulate a crash test which I have previously done. The trajectory of the impactor before impact is complex and requires several linkages and mechanisms to set up. The area of interest is the post-impact behaviour (stress/strain) on the target component, as well as the trajectory of the impactor. When I run the impactor by itself, to see the launch trajectory, I get a reasonable run time of about an hour. When I run the impactor with a simplified initial velocity + the target with all the contact and failure cards defined, I get a reasonable run of about 3 hours. When I run the full model: impactor with the initial trajectory + the target with all the contact and failure cards defined, I get a run around 12 hours to reach the impact, and another 12-24 hours to get results from post impact trajectory. I believe this is partly due the finer mesh required for the target model. I was hoping there is a way I can split the analysis in two, using the results from a the first as an initial condition for the second. Consider the following scenario: Model A: Simple model with only what is required to set off the trajectory of the impactor. The target is not modeled. Run from T=0 to T=T_impact. The run is stopped at the moment where the impact would have occurred. Model B: The target, with finer mesh and contact and fail definition is introduced, and the analysis is "RESTART" picking up from where Model A left off. In other words the target (with finer mesh) only appears just before impact onwards. This should theoretically cut down the majority of the analysis time. Is there a way to set up a RESTART file with introduction of new elements / properties / fail cards, and linking it to a "Stopped" run? I hope the diagrams attached illustrates what I'd like to do. Please let me know if there is a way to do this. Thank you. Best Regards, MN
  15. Hi everybody, could anyone suggest me how I can import stress from moldex 3D in radioss? Or, if it's possible to initialize stress with fields->value from .csv Thanks a lot.
  16. Hi, How to Clear the temporary nodes? Find the following Image. It is not cleared even it I use the option ( Shift +F2) and it is showing in Post processing. Is there any other way to clear?
  17. Im attaching the .rad and .out file. fullcar.hm_0000.out fullcar.hm_0000.rad
  18. Hello, I'm trying to create a simple model of a tensile test for composite material. I have data from a real tensile test and i want to compare the data of the force/strain diagramm with the simulation model. To realise that i tried to read the output data of the nodes with the /TH/NODE card for die displacement and the /TH/SECT card for die forces. My problem is that i don't get any data for the forces in the T01 file. The Question is now: Is my defintion for the cross section incorrecton? Greetings Eugen Tensile Test.rar
  19. Hello, I would like to know what kind of beam I should use for my simulation and I struggle to find the differences between the P18_INT_BEAM and the P3_beam. I saw that in bending, the bigger the deformation get, the bigger differences are between the two kinds of beam. Could somebody give me more informations about that ? Regards, Camille
  20. I am getting errors in RADIOSS when I tried to simulate the crash model that has been exported from HyperCrash. ERROR ID : 286** ERROR IN INPUT CONSISTENCYDESCRIPTION : QUAD ARE NOT COMPATIBLE WITH N2D3D=0 ERROR ID : 760** RADIOSS STOP DUE TO INPUT ERROR What would be the solution for these errors? I cannot share the model due to the confidential issues.
  21. 嗨, 我使用教程RD-3030模態進行沖擊分析使用Hypercrash radioss V14,然後我嘗試使用自己創建的模型,兩個模型都使用相同的設置,元素大小邊界條件等等,但作為圖如下所示,能量平衡顯示不同的尺度,我該如何解決這個問題呢? 感謝您的回复! 順便說一句,作為參考,我將引擎文件設置為動畫輸出頻率:0.001,時間歷史輸出頻率:1E-005。
  22. Hello everybody, I have some problems with stress initialization simulation of solid element: I'd like to do a simulation made of two step where the second step shall take into account strain and stress of first step. I have try to use \inista but there is something wrong because in second step, at first frame, the part have no stress. The procedure I have used is: - STEP I: /IOFLAG - eport solver deck from HyperView for the deformed shape - STEP II: /INISTA In attach the file .rad of simulation. Thank you in advance for your help! Marta CUBO_stepII_0000.out CUBO_stepII_0000.rad CUBO_stepII_0001.out CUBO_stepII_0001.rad CUBO_deformato.rad CUBO_stepI_0000.out CUBO_stepI_0000.rad CUBO_stepI_0000.sty CUBO_stepI_0001.out CUBO_stepI_0001.rad CUBO_stepI_0006.sty
  23. I'm trying to run an analysis in Radioss and I get an "Error ID 54". Together with some more errors and warning. I attach the .out file (complete) ERROR ID : 54 ** ERROR IN INPUT FORMAT DESCRIPTION : IN BLOCK : 581 588 589 590 591 592 593 594 595 596 Thanks for helping new_0000.out
  24. Hi, I've done a form simulation in Hyperform and I would like to import the .sta file in a new simulation made with radioss block, but when I run the second simulatio an error occours. The error is: ERROR ID : 1101 ** INPUT ERROR DESCRIPTION : CANNOT OPEN INCLUDE FILE SOLUTION : PLEASE CHECK IF INCLUDE FILE LIES IN THE DIRECTORY Could someone halp me? Thank you in advance
×
×
  • Create New...